GIUSP unsafe-situations decision flow (diagram)

Note 14 of 36 · free to read

How to read the GIUSP diagram: the two unsafe categories, the separate safe-shortfall panel, and the question that decides the action.

An assessment leads to two GIUSP unsafe categories: ID, immediate danger if left connected to gas, and AR, potential danger. A separate panel describes a safe standards shortfall recorded outside GIUSP, sometimes called NCS. Assess interacting faults and seek competent guidance if unsure. Classification is followed by the applicable action: some AR defects need referral because turning off does not reduce the risk. — GIUSP unsafe-situations decision flow

Reading the diagram

Start at the top: assess the actual danger, looking at each fault and at how faults interact. Then classify.

The ID card: an immediate danger to life or property if the appliance or installation stays connected to gas. A switched-off burner can still be ID, for example where gas is escaping.
The AR card: one or more faults that could create a danger in future. Potential danger still needs action.
The lower panel: a shortfall against a current standard that you have assessed as safe. It sits outside the unsafe procedure; record and explain it separately. Some businesses still record it as NCS.

After you classify

The diagram stops at classification; the actions follow from it.

Try to put the fault right, with the gas user's agreement.
ID that you cannot fix: with permission, disconnect and seal, attach a DANGER DO NOT USE label and issue a warning notice. If permission is refused, turn off where possible and call the Gas Emergency Contact Centre, or the gas supplier for LPG.
AR that you cannot fix: ask whether turning off removes the risk. If it does, turn off with permission, label and issue a warning notice. If it does not, as with a building constructed over a gas service pipe, issue a warning notice saying who to contact and attach no label.

Unsure?

Seek competent guidance immediately and protect people from the risk while you do. Never classify from the appliance's age, the customer's preference or one reassuring test result.